Yep! I'm still playing my Heart Gold. I just completed the Nuzlocke challenge, actually. My only two survivors after defeating Red was Cyrus, the level 72 Espeon, Havok, the level 89 Typhlosion, and Zeus the level 79 Ampharos. But, now that the challenge is over, I'm going back and breeding/trying to complete my Pokedex as best as I can while raising my Pokemon(I'm currently trying to raise a Pichu to level 100.) But, yeah. Between Heart Gold and Leaf Green, I'm perfectly content until a R/S/E remake comes out.